Inverted incandescent lamp.



No. 743,342. PATENTED NOV. 6.190s.

' T. B. '& T. E. SMITH.

INVERTED INOANDESGENT LAMP.

APPLICATION FILED JULY 31, 1903.

N0 MODEL.

W1 fnvenzors Lungssea. 01% E l5,

j 7% %M JQW/z UNITED STATES Patented November 3, 1903.

PATENT GFFICE.

THOMAS BAKER SMITH AND THOMAS ERNEST SMITH, OF HANDSYVORTH, ENGLAND.

VINVERTED INCANDESCENT LAMP.

SPECIFICATION forming part of Letters Patent No. 743,342, dated November 3, 1903.

7 Application filed July 3111903- To all whom it may concern:

Be it known that we,THoMAs BAKER SMITH, a resident of Ribblesdale, 8 Holly road,and THOMAS ERNEST SMITH, a resident of 72 Sycamore road, Handsworth, in the county of Stafford, England, subjects of the King of Great Britain, have invented certain new and useful Improvements in Inverted Incandescent Lamps, of which the following is a specification.

It is found in inverted incandescent-lamp fittings of present make that the heat and products of combustion very quickly and materially discolor and deteriorate those parts of the fittings which are "above the burner; and it is to lessen or entirely remove these objections that we have made this our invention.

Broadly, our invention consists in providing the burner with a hood device having an opening or outlet for the escape of theheated air and products of combustion, such hood being provided with a chute-like exit by illustrated in the accompanying drawings, in

which- Figure 1 is a part-sectional view of our invention as applied to an inverted incandescent gas-burner. Fig. 2 is a detached plan view of the hood and the chute. Fig. 3 is a View in elevation of the hood and chute. Fig. 4 shows a modified form of hood, reduced in size, made in one with the cone of the burner. Fig. 5 shows a further modified form, reduced in size, of hood, to which the shademay also be secured.

Similar numbers of reference indicate the same part throughout the several views- It will be readily understood that the burner itself and also the design of the fitting may be modified without interfering with the nature of this invention. The shape illustrated is therefore selected as being-very suitable to explain our invention. Usually (but not nec- Serial No. 167,763. (No model.)

essarily) such burners are furnished with a deflecting-cone 6, of porcelain or the like, below which at a little distance is carried the ring or band 7, to which the shade 8 (shown in dotted lines) is secured by means of the screws 9.

10 is a hood which rests upon the upper end of the cone 6 and fits into or about the aforesaid ring 7, so as to inclose the opening between such band and the upper part of the cone. This hood or cover is carried around any desired distance, according to the char.- acter of the fitting carrying the burner.

In the illustration, 11 represents the fitting from which the burner is carried and is shown as a single arm. Consequently one opening 12 is used, which is situated on the opposite side to the said arm; but more than one opening may be used, if desired, so long as the closed part of the hoodlies below the arm 11 or other parts of the fitting which are to be protected. In some cases the hood may be made, as shown at 10, deep enough to allow of the opening being made at its upper part, and thus to leave a connecting-band 13 at the lower edge. (See Fig. 5.)

It will be readily seen that the ring 7 may be dispensed with, if desired, and the lower part of the hood adapted to carry the shade, as seen, for example, in Fig. 5. The said hood may also be made in one with the cone 6, as shown at 10 for example, in Fig. 4, in which case the shade-supporting ring 14 may depend from the projecting ledge 15. From the upper part of this opening 12 we form the chute-like deflector 16, which is curved or shaped outward. Hence as the hot air rises from the burner it can only escape through this opening, and in so doing it is further thrown outward by the deflector 16, so as to be quite clear of the fittings lying above the burner. This deflector may be carried all around, as indicated in dotted lines, or as far a deflector arranged above the outlet or outlets for deflecting the heated air away from the burner-fitting, substantially as described.

2. The combination in an inverted incan- 5 descent burner of the burner-cone 6 suitably carried from the main fitting, a hood carried above the burner-cone whose closed parts are placed below the superimposed fittings, and having an outlet or outlets disposed in an opza posite direction to the superimposed fittings,

substantially as set forth and shown.

3. The combination in an inverted incandescent burner, of the burner-cone 6, a hood suitably carried above said burner cone and having an exit-opening, and the outwardly 15 and upwardly curved chute-like deflector 16 disposed above and in conjunction with such opening, substantially as set forth and shown.

In testimony whereof we have signed our names to this specification in the presence of 20 two subscribing witnesses.

THOMAS BAKER SMITH. THOMAS ERNEST SMITH. Witnesses:

O. HAYWARD POWELL, J. B. HAYWARD. 

